The stylization quality degradation caused by the OFB loss may be due to the complexity of the videos in the DAVIS dataset. According to the official statistics [1]}, 60% of videos have complicated deformations, 42% of videos contain fast-moving objects (per-frame object motion is larger than 20 px), and 36% of videos contain occluded objects and other difficult cases. As mentioned in Section , these scenarios are challenging for optic flow estimation and will lead to inaccurate optical flow estimation. It is difficult to design a better optic flow estimation algorithm to avoid stylization quality degradation of the OFB loss, because this task is also quite challenging.
